dataedit.cpp

C++ Builder 6 编程实例教程-北京希望电子出版社出版

//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop

#include "DataEdit.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
TBookmark SavePlace;

//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::FormCreate(TObject *Sender)
{
Form1->Timer1->Enabled=true;
//设置控件的有效状态
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button1Click(TObject *Sender)
{
Form1->Table1->First();
//移动到第一条记录
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button2Click(TObject *Sender)
{
Form1->Table1->Prior();
//向前移动一条记录
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button3Click(TObject *Sender)
{
Form1->Table1->Next();
//移动到下一条记录
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button4Click(TObject *Sender)
{
Form1->Table1->Last();
//移动到最后一条记录
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button5Click(TObject *Sender)
{
Form1->Table1->Insert();
//在当前位置插入一条记录
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button6Click(TObject *Sender)
{
Form1->Table1->Delete();
//删除当前记录
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button7Click(TObject *Sender)
{
   SavePlace=Form1->Table1->GetBookmark();
   //在当前位置设置一个书签
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button8Click(TObject *Sender)
{
if (SavePlace!="")
   {
   Form1->Table1->GotoBookmark(SavePlace);
   //跳转到指定书签
   }
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button9Click(TObject *Sender)
{
Form1->Table1->Close();
//关闭数据库
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Timer1Timer(TObject *Sender)
{
if (Form1->Table1->Eof)
   {
   Form1->Button4->Enabled=false;
   Form1->Button3->Enabled=false;
   }
   else
   {
   Form1->Button4->Enabled=true;
   Form1->Button3->Enabled=true;
   }
   //动态设置“Next”和“Last”按钮的有效状态
if (Form1->Table1->Bof)
   {
   Form1->Button1->Enabled=false;
   Form1->Button2->Enabled=false;
   }
   else
   {
   Form1->Button1->Enabled=true;
   Form1->Button2->Enabled=true;
   }
   //动态设置“First”和“Prior”按钮的有效状态
}
//---------------------------------------------------------------------------